Motor-vehicle jack.



J. GRAINGER L W. H. SROHM,

Moon VEHICLE JACK.

. APPLICATION FILED SEPT. H, i917.

Patente Jim-a 25,. 19MB;

2 SHEETS--SHET 1.

ubllnunvlii l To lower the wheel into'contact with the v, g,'round,`it isonly necessary to back the car end of the brake-drum 20 indicated by the up, and then the jack is locked in normal position, as will be understood. f

The jack asus'ed on the front axle B, will be formed with a rentrant' angle 14, to avoid conflict with the bar 15 of the steerin gear.

A portion 16 of the tread 3 will pre erably occupy a position nearer the `axle than the felly 17 -of the wheel so as to permit the wheel to be jacked up with or without the tire on. v

The preferred form of jack permits the car to be jacked up and lowered 1nto contact with the roadway without any jarring.

To associate' the jack with the rear drive axle, in the preferred manner, we prefer to make the bearing-member G of two members, and secure them together after any suitable manner. The bearing-member G. is substantially identical in construction to the bearing-member G, only that it is provided that an eccentric bore 18 by means of which the bearing-member is clamped tightly around the hub 19 of the brake-drum indicated by the dotted circle 20. 21 is the drive-axle and 22 the tubular housing therefor. The hub 23 of the jack 24.- is made to have bearing on the bearing-member G. Secured to or formed a part of the jack 24 is a stud 25, and in order toposition this stud in convenient relationship in respect of the drive-wheel 26, the jack is dished as shown clearly in Fig. 7, to position the tread or periphery 3 thereof beyond the outer broken line 27, Fig. 7. To jack up the rear wheel, when the Jack 24 is unlocked, 'and since the jack has an eccentric'movement in respect of the drive-wheel 26, the stud 25 follows substantially the path indicated by the broken line 28, which will bring it into the path of movement of one or more studs 29, carried 'by the felly. In Fig. 2, the

wheel is presumed to be positioned between the s ectator and the jack, and therefore be understood that as the wheelrotact with the stud 25 and -so move the jack to effect the purpose in view. By means of the dierentlal gear, (not shown) contrllin the drive-axle 21, so soon as the jack 24 1s stopped from further movement, the said wheel will cease movement.

|I he eccentric y pivotal -movement ,given the jack 24, will position the stud 25 clear of the path of movement of the stud 29 when the said jack occupies normal position.

It is important that the jacks be firmly locked in place against accidental displacement: Any suitable 'means for this purpose may be employed, and a convenient means consists of a screw a, threaded through the ference liar 7 and exerting pressure a inst the bar 8 to lock it in the notches l?.l By retracting the screw a, suiliciently, the bar 8 will be allowed suicient movement to permit the jack to be unlocked.

While we have described what we con- Sider to be the best embodiments of our invention, it will be understood that the principle ma be embodied in different forms, and we esire not to be limited beyond the requirements of the prior art and the terms of our claims.

Inorder to keep the bar 8 incontact with the flanges 2 of the bearing-member G to prevent rattling, and also to assist in keeping the bar 8 in the notches 13, coiled springs b are mounted on the ends of the bar 4, one end of the springs being secured to said bar, and the other end secured to the sleeves 5.

What we claim as our invention is:

1. In a motor-vehicle, the combination' more studs, of a bearing member eccentrically mounted from said support, a jack eocentrically mounted on said bearing-member, provided with a lu which, when the jack is'moved downwar y, will be brought intothe path of movement of the studs car-.

ried by said wheel, one of which will contagt therewith during the rotation of said w eel and so move the jack around its axis to jack up the wheel.y

2. In a motor-vehicle, the combination with an axle thereof; and a wheel carried thereby lprovided with one or more studs' of a bearing member eccentrically mounted on said axle; a jack provided with a trend eccentric to the axis of said wheel and journaled on said bearing member and further provided with a lug which, when the jack is moved downwardly, will be brought into los the path of movement of the studs carried 3. In a motor-vehicle, the combination vwith an axle thereof, and a wheel carried thereby provided with one or more studs v.of a bearing member eccentrically mounted ony said axle and provided with radially disposed anges spaced apart which are formed to provide shoulders; a jackprovided with a tread eccentric to the axis of said wheel and journaled on said bearing member between the Han es thereof, and further provided with a ug which, when, the *jack is moved downwardly, will be brought into the path of movement of the studs carried by the said wheel, one of which will contact therewith during the rotation of said wheel and \so move the jack around its axis to jack up the wheel, and means carried by said jack whereby the movement smeew thereof le limited by eoniec; *with .seid shoulders, and. whereby the jack is ocked in nomelfposition...

thereby provided with one or more etus;

. of e bearing member eccentrieely mounte on said axle and provided with reoely disposed flanges 'spaced apart which ere formed to provide two .fpeile of shoulders; a, jack provided. with o treed eccentric te the exis of seid Wheelzmd journeef on seid beerng member eaween the en es ahereo eed further provie with e ug which, when the jaekf is. moved` dowmverly, Wl be f brought into `the path of movement of the studs carried. by seie Whee, for the purpose 'speeied; e ber carried 'by sai jack en1- normaly resting in Contact with one peil' of said ehoudere; e ffl-"eme moveby mounted on. seid berA and designed to he positioned beyond each side of seid bearing; membel'; enothef ber moveby mounted on seid frame designed zo perform the function of e boli: to rest in the notch formed in seid emges; springs cerrbd by seid frame to keep seid bolt in seid notches, and a screw carried by said 'frame and designed to lock said boli: in peee; seid bar designe/( to be brought into Contact with theother pair of seid shoulders of seid bearing member to limit the oww Werd movement o1"- sed jack.

JSEPH GRAINGER. WTLL'LAM' HENRY STRGHM 

